信号长度与基于信道估计的信号分离精度研究  

Investigation between Signal Size and Accuracy of a Signal-separation Based on Channel Estimation

作　　者：梅秀庄[1] 韩峰[1] 孟鲁民[1] 

机构地区：[1]内蒙古工业大学机械学院,内蒙古呼和浩特010051

出　　处：《现代电子技术》2009年第11期34-36,共3页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(60672138);内蒙古工业大学科研基金项目(X200712)

摘　　要：介绍一种以相关分析为基础的信道参数估计方法,引入信号长度比概念,通过对不同长度比条件下的信号进行实验发现,信道参数估计精度与信号长度比之间近似为指数函数关系;当信号长度与信号周期之比不小于2时,可实现工程应用中的高精度信道参数估计。研究结果也适合相关值计算及基于相关计算的时延估计、信号匹配等算法的精度分析。Signal size usually dominates the speed and precision of a signal - separation practice. In order to balance between a reasonable speed and precision,the determination of a proper concerned signal size is usually a problem. A signal separation method through channel - parameter estimation based on correlation analysis and a ratio concept of signal size to one signal period are introduced. By doing a number of experiments on signals with different signal size ratio,the relationship between signal -separation precision and signal size ratio is approximate to an exponential function. On condition that signal size ratio is more than or equal to two,the accuracy of signal- separation satisfies requirement of engineering application. This result also adapts for precision analysis of correlation - value computing and other algorithms based on correlation computing, such as time-delay estimation,signal matching.

关 键 词：信号分离 信号长度 信道估计 精度 

分 类 号：TN911.23[电子电信—通信与信息系统]